FX and HD have the same sole. On the website they call it the 7mm sole but that’s not right. That must include the removable insole. It is the thin 4mm heat moldable sole. After two days that will pack out to be super thin.
The strobl sole is thinner to start. The Powerwrap sole is much much thicker.
Personally I find most intuitions too soft and don’t give good heel hold for that reason. I would never use one that isn’t an HD foam.
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